GARRETT CLARK MARTIN M.D.
NPI 1083648596
Internal Medicine in Detroit, MI
About Garrett Clark Martin M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARRETT CLARK MARTIN M.D. (NPI 1083648596) is an individual internal medicine provider in Detroit, Michigan, licensed in Maryland (D67934) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Holy Cross Hospital, and is a graduate of Meharry Medical College School Of Medicine (2001).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Garrett Clark Martin M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show Garrett Martin reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hagerstown, MD 21742
- Reassigned Medicare billing, Maryland and District of Columbia enrollments
- Also billed through NPI 1427814979 (District of Columbia)
- 101 clinicians in this Medicare group
Frederick, MD 21701
- Reassigned Medicare billing, District of Columbia enrollment
- 204 clinicians in this Medicare group
Germantown, MD 20876
- Reassigned Medicare billing, District of Columbia enrollment
- 58 clinicians in this Medicare group
Timonium, MD 21093
- Reassigned Medicare billing, Maryland enrollment
- 24 clinicians in this Medicare group
Elkton, MD 21921
- Reassigned Medicare billing, District of Columbia enrollment
- 347 clinicians in this Medicare group
Savannah, GA 31405
- Reassigned Medicare billing, Georgia enrollment
- 74 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 8
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Holy Cross Hospital
Acute Care Hospitals · Silver Spring, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DETROIT, MI 48215
DETROIT, MI 48215
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Garrett Martin's NPI number?
The NPI number for Garrett Martin is 1083648596. It was assigned to this individual provider in the NPPES registry on July 10, 2006.
Where is Garrett Martin located?
Garrett Martin practices at 13901 E Jefferson Ave, Detroit, MI 48215. The listed phone number is (313) 822-0900.
What is Garrett Martin's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Garrett Martin enrolled in Medicare?
Yes. Garrett Martin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Garrett Martin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Garrett Martin reassigns Medicare benefits to 6 organizations: Synergy Medical Group LLC (Hagerstown, MD), Hospitalist Medicine Physicians Of Maryland PC (Frederick, MD), Galen Inpatient Physicians PC (Germantown, MD), Synergy Medical Group Im LLC (Timonium, MD), Usacs Integrated Acute Care Services Of Maryland, LLC (Elkton, MD) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Garrett Martin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Garrett Martin affiliated with any hospitals?
According to CMS data, Garrett Martin is affiliated with Holy Cross Hospital.
When was this NPI record last updated?
The NPPES record for Garrett Martin was last updated on August 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Garrett Clark Martin, M.D. · NPI 1083648596
Internal Medicine physician in Detroit, Michigan. Individual provider, active in the CMS NPPES registry since July 10, 2006.
## Identity
- **NPI:** 1083648596 (Entity type: Individual)
- **Enumerated:** July 10, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** D67934 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 13901 E JEFFERSON AVE, Detroit, MI 48215-2720
- **Phone:** (313) 822-0900 · **Fax:** (313) 822-0950
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Synergy Medical Group LLC (NPI 1992695704, Hagerstown, MD); Hospitalist Medicine Physicians Of Maryland PC (NPI 1992945471, Frederick, MD); Galen Inpatient Physicians PC (NPI 1225923154, Germantown, MD); Synergy Medical Group Im LLC (NPI 1043155187, Timonium, MD); Usacs Integrated Acute Care Services Of Maryland, LLC (NPI 1922598929, Elkton, MD); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Meharry Medical College School Of Medicine, class of 2001
## Record status
- **NPPES last updated:** August 12, 2025
- **Other identifiers:** Medicaid 4670740 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1083648596) · Data from the CMS NPPES public registry.